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Q106 (CAPF/2026) Science & Technology › New Materials, Energy & Environment-linked Tech

Which of the following is/are renewable source(s) of energy?
1. Fossil fuel
2. Biofuel
3. Uranium
4. Hydropower
Select the correct answer using the code given below.

Result
Your answer:  ·  Correct: D

Explanation

Renewable energy sources are those that are replenished naturally on a human timescale.

  • Biofuel (2): Derived from biomass (organic matter like plants and agricultural waste), which can be regrown or replenished relatively quickly.
  • Hydropower (4): Utilizes the energy of flowing water, which is a continuous part of the Earth's solar-driven water cycle.
  • Fossil fuels (1): Such as coal, petroleum, and natural gas, are non-renewable because they take millions of years to form and are depleted much faster than they are created.
  • Uranium (3): Used in nuclear power plants. While nuclear energy is a low-carbon source, uranium is a finite mineral resource mined from the earth and does not replenish itself; therefore, it is classified as a non-renewable resource.

Thus, only 2 and 4 are renewable sources of energy.

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